BÄCKMAN, S.; LANSINK, A. Crop and soil specific N and P efficiency and productivity in Finland. Agricultural and Food Science, [S. l.], v. 14, n. 3, p. 264–276, 2005. DOI: 10.2137/145960605775013245. Disponível em: https://journal.fi/afs/article/view/5810. Acesso em: 20 apr. 2024.